Engine Backfire
Thread Starter
Racer
Joined: Jan 2002
Posts: 252
Likes: 0
From: Green Bay WI
Engine Backfire
I have a 67 small block with side exhaust. When I back off the accelerator I'll get some back fire through the passenger side exhaust pipe. This only happens after the engine is warm. The last time I had my oil changed I notice two tiny holes in the side exhaust pipe. Could this be the culprit or are there other things to look for. Thanks
Melting Slicks
Joined: Oct 2001
Posts: 3,025
Likes: 12
From: Pleasant Grove AL
Re: Engine Backfire (steinboy56)
It's probably normal to get some popping through the exhaust when decellerating. Look at race cars with open exhaust. You are probably noticing it more because the baffles in your sidepipe are shot. Just a long distance guess.
Le Mans Master
Joined: Apr 2000
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From: New York New York
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Re: Engine Backfire (steinboy56)
If the engine is running rich and with the holes in the pipe, it could be igniting the excess fuel in the exhaust by adding oxygen for combustion.
